1 /* Modified 1999 Morten Welinder:
3 * 2. parseFileFree function.
5 // 2000 HWN: AFM_ prefixes.
7 * (C) 1988, 1989 by Adobe Systems Incorporated. All rights reserved.
9 * This file may be freely copied and redistributed as long as:
10 * 1) This entire notice continues to be included in the file,
11 * 2) If the file has been modified in any way, a notice of such
12 * modification is conspicuously indicated.
14 * PostScript, Display PostScript, and Adobe are registered trademarks of
15 * Adobe Systems Incorporated.
17 * ************************************************************************
18 * THE INFORMATION BELOW IS FURNISHED AS IS, IS SUBJECT TO CHANGE WITHOUT
19 * NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ADOBE SYSTEMS
20 * INCORPORATED. ADOBE SYSTEMS INCORPORATED ASSUMES NO RESPONSIBILITY OR
21 * LIABILITY FOR ANY ERRORS OR INACCURACIES, MAKES NO WARRANTY OF ANY
22 * KIND (EXPRESS, IMPLIED OR STATUTORY) WITH RESPECT TO THIS INFORMATION,
23 * AND EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR PARTICULAR PURPOSES AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
25 * ************************************************************************
30 * This header file is used in conjuction with the parseAFM.c file.
31 * Together these files provide the functionality to parse Adobe Font
32 * Metrics files and store the information in predefined data structures.
33 * It is intended to work with an application program that needs font metric
34 * information. The program can be used as is by making a procedure call to
35 * parse an AFM file and have the data stored, or an application developer
36 * may wish to customize the code.
38 * This header file defines the data structures used as well as the key
39 * strings that are currently recognized by this version of the AFM parser.
40 * This program is based on the document "Adobe Font Metrics Files,
41 * Specification Version 2.0".
43 * AFM files are separated into distinct sections of different data. Because
44 * of this, the parseAFM program can parse a specified file to only save
45 * certain sections of information based on the application's needs. A record
46 * containing the requested information will be returned to the application.
48 * AFM files are divided into five sections of data:
49 * 1) The Global Font Information
50 * 2) The Character Metrics Information
51 * 3) The Track Kerning Data
52 * 4) The Pair-Wise Kerning Data
53 * 5) The Composite Character Data
55 * Basically, the application can request any of these sections independent
56 * of what other sections are requested. In addition, in recognizing that
57 * many applications will want ONLY the x-width of characters and not all
58 * of the other character metrics information, there is a way to receive
59 * only the width information so as not to pay the storage cost for the
60 * unwanted data. An application should never request both the
61 * "quick and dirty" char metrics (widths only) and the Character Metrics
62 * Information since the Character Metrics Information will contain all
63 * of the character widths as well.
65 * There is a procedure in parseAFM.c, called parseFile, that can be
66 * called from any application wishing to get information from the AFM File.
67 * This procedure expects 3 parameters: a vaild file descriptor, a pointer
68 * to a (FontInfo *) variable (for which space will be allocated and then
69 * will be filled in with the data requested), and a mask specifying
70 * which data from the AFM File should be saved in the FontInfo structure.
72 * The flags that can be used to set the appropriate mask are defined below.
73 * In addition, several commonly used masks have already been defined.
76 * original: DSM Thu Oct 20 17:39:59 PDT 1988
77 * modified: DSM Mon Jul 3 14:17:50 PDT 1989
78 * - added 'storageProblem' return code
89 /* Possible return codes from the parseFile procedure.
91 * ok means there were no problems parsing the file.
93 * parseError means that there was some kind of parsing error, but the
94 * parser went on. This could include problems like the count for any given
95 * section does not add up to how many entries there actually were, or
96 * there was a key that was not recognized. The return record may contain
97 * vaild data or it may not.
99 * earlyEOF means that an End of File was encountered before expected. This
100 * may mean that the AFM file had been truncated, or improperly formed.
102 * storageProblem means that there were problems allocating storage for
103 * the data structures that would have contained the AFM data.
106 #define AFM_parseError -1
107 #define AFM_earlyEOF -2
108 #define AFM_storageProblem -3
112 /************************* TYPES *********************************/
113 /* Below are all of the data structure definitions. These structures
114 * try to map as closely as possible to grouping and naming of data
119 /* Bounding box definition. Used for the Font AFM_BBox as well as the
120 * Character AFM_BBox.
124 int llx; /* lower left x-position */
125 int lly; /* lower left y-position */
126 int urx; /* upper right x-position */
127 int ury; /* upper right y-position */
131 /* Global Font information.
132 * The key that each field is associated with is in comments. For an
133 * explanation about each key and its value please refer to the AFM
134 * documentation (full title & version given above).
138 char *afmVersion; /* key: StartFontMetrics */
139 char *fontName; /* key: FontName */
140 char *fullName; /* key: FullName */
141 char *familyName; /* key: FamilyName */
142 char *weight; /* key: Weight */
143 float italicAngle; /* key: ItalicAngle */
144 BOOL isFixedPitch; /* key: IsFixedPitch */
145 AFM_BBox fontBBox; /* key: FontBBox */
146 int underlinePosition; /* key: UnderlinePosition */
147 int underlineThickness; /* key: UnderlineThickness */
148 char *version; /* key: Version */
149 char *notice; /* key: Notice */
150 char *encodingScheme; /* key: EncodingScheme */
151 int capHeight; /* key: CapHeight */
152 int xHeight; /* key: XHeight */
153 int ascender; /* key: Ascender */
154 int descender; /* key: Descender */
155 } AFM_GlobalFontInfo;
158 /* Ligature definition is a linked list since any character can have
159 * any number of ligatures.
161 typedef struct _t_ligature
164 struct _t_ligature *next;
168 /* Character Metric Information. This structure is used only if ALL
169 * character metric information is requested. If only the character
170 * widths is requested, then only an array of the character x-widths
173 * The key that each field is associated with is in comments. For an
174 * explanation about each key and its value please refer to the
175 * Character Metrics section of the AFM documentation (full title
176 * & version given above).
180 int code, /* key: C */
182 wy; /* together wx and wy are associated with key: W */
183 char *name; /* key: N */
184 AFM_BBox charBBox; /* key: B */
185 AFM_Ligature *ligs; /* key: L (linked list; not a fixed number of Ls */
186 } AFM_CharMetricInfo;
189 /* Track kerning data structure.
190 * The fields of this record are the five values associated with every
193 * For an explanation about each value please refer to the
194 * Track Kerning section of the AFM documentation (full title
195 * & version given above).
207 /* Pair Kerning data structure.
208 * The fields of this record are the four values associated with every
209 * KP entry. For KPX entries, the yamt will be zero.
211 * For an explanation about each value please refer to the
212 * Pair Kerning section of the AFM documentation (full title
213 * & version given above).
224 /* AFM_Pcc is a piece of a composite character. This is a sub structure of a
225 * AFM_CompCharData described below.
226 * These fields will be filled in with the values from the key AFM_Pcc.
228 * For an explanation about each key and its value please refer to the
229 * Composite Character section of the AFM documentation (full title
230 * & version given above).
240 /* Composite Character Information data structure.
241 * The fields ccName and numOfPieces are filled with the values associated
242 * with the key CC. The field pieces points to an array (size = numOfPieces)
243 * of information about each of the parts of the composite character. That
244 * array is filled in with the values from the key AFM_Pcc.
246 * For an explanation about each key and its value please refer to the
247 * Composite Character section of the AFM documentation (full title
248 * & version given above).
259 * Record type containing pointers to all of the other data
260 * structures containing information about a font.
261 * A a record of this type is filled with data by the
262 * parseFile function.
266 AFM_GlobalFontInfo *gfi; /* ptr to a AFM_GlobalFontInfo record */
267 int *cwi; /* ptr to 256 element array of just char widths */
268 int numOfChars; /* number of entries in char metrics array */
269 AFM_CharMetricInfo *cmi; /* ptr to char metrics array */
270 int numOfTracks; /* number to entries in track kerning array */
271 AFM_TrackKernData *tkd; /* ptr to track kerning array */
272 int numOfPairs; /* number to entries in pair kerning array */
273 AFM_PairKernData *pkd; /* ptr to pair kerning array */
274 int numOfComps; /* number to entries in comp char array */
275 AFM_CompCharData *ccd; /* ptr to comp char array */
280 /************************* PROCEDURES ****************************/
282 /* Call this procedure to do the grunt work of parsing an AFM file.
284 * "fp" should be a valid file pointer to an AFM file.
286 * "fi" is a pointer to a pointer to a FontInfo record sturcture
287 * (defined above). Storage for the FontInfo structure will be
288 * allocated in parseFile and the structure will be filled in
289 * with the requested data from the AFM File.
291 * "flags" is a mask with bits set representing what data should
292 * be saved. Defined above are valid flags that can be used to set
293 * the mask, as well as a few commonly used masks.
295 * The possible return codes from parseFile are defined above.
298 int AFM_parseFile (FILE *fp, AFM_Font_info **fi, FLAGS flags);
299 void AFM_free (AFM_Font_info *fi);